MESON Chess Problem Database

Problem Display
PID: 263274 (2R5/1p2p1p1/2r1b3/R1N1pn1q/1Nk1p1Q1/P4pp1/K1PPr3/B3nB2 w - - 0 1)

Eerkes, Allard Pieter

Szachy, 1949

2R5/1p2p1p1/2r1b3/R1N1pn1q/1Nk1p1Q1/P4pp1/K1PPr3/B3nB2

#2

11 + 14

6490 yacpdb 2022

SOLUTION

  • SOUND
  • Sets
    • 1...Rxc5
      • 2.Raxc5#
      • 2.Rcxc5#
    • 1...Sxc2
      • 2.d3#
    • 1...Sg2
      • 2.d3#
    • 1...Sd3
      • 2.cxd3#
    • 1...Se3
      • 2.Qxe4#
    • 1...Sh4
      • 2.Qxe4#
    • 1...Sd6
      • 2.Qxe6#
    • 1...Sh6
      • 2.Qxe4#
  • Tries
    • 1.Sa4?
      • threat
        • 2.Sb6#
      • 1...b5
        • 2.Rxc6#
      • 1...b6
        • 2.Sxb6#
        • 2.Rxc6#
      • 1...Bxc8!
    • 1.Sd7?
      • threat
        • 2.Sxe5#
        • 2.Sb6#
      • 1...Sd3
        • 2.Sb6#
        • 2.cxd3#
      • 1...Se3
        • 2.Sb6#
        • 2.Qxe4#
      • 1...Sd4
        • 2.Sb6#
      • 1...Sh4
        • 2.Sb6#
        • 2.Qxe6#
        • 2.Qxe4#
      • 1...Sd6
        • 2.Sb6#
        • 2.Qxe6#
      • 1...Sh6
        • 2.Sb6#
        • 2.Qxe6#
        • 2.Qxe4#
      • 1...b5
        • 2.Rxc6#
      • 1...b6
        • 2.Sxe5#
        • 2.Sxb6#
        • 2.Rxc6#
      • 1...Bxd7!
    • 1.Bxe2+?
      • 1...Sd3
        • 2.Bxd3#
        • 2.cxd3#
      • 1...fxe2!
  • Keys
    • 1.Scd3!
      • threat
        • 2.Sxe5#
      • 1...Sxd3
        • 2.cxd3#
      • 1...Se3
        • 2.Qxe4#
      • 1...Sd4
        • 2.Sb2#
      • 1...Sh4
        • 2.Qxe6#
      • 1...Sd6
        • 2.Qxe6#
      • 1...Sh6
        • 2.Qxe6#
      • 1...b5
        • 2.Rxc6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 2
    • REMOVED MATES = 2
  • Sets
    • S(a);N_GUARD,XP(D)::P(E)
    • S(a);N_GUARD::P(E)
    • S(a);N_SPINR(b),OGATE::P(D),XS(a)
    • S(h);N_GUARD::QAR2(H),XP(f)
    • S(h);OGATE::QAB(H),XB(k)
  • Tries
    • Try
      • S(J);
      • Threat
        • S(J)
      • Vars
        • P(l);N_GUARD::R(K),XR(j)
      • Refutation
        • B(k);XR(K)
    • Try
      • S(J);
      • Threat
        • DUALS(2)
      • Vars
        • S(h);N_SPINP(f)::S(J)
        • P(l);N_GUARD::R(K),XR(j)
      • Refutation
        • B(k);XS(J)
    • Try
      • B(B);CHECK,XR(b)
      • Refutation
        • P(c);XB(B)
  • Actual
    • S(J);N_PINR(b),P_PINR(j)
    • Threat
      • S(J),XP(g)
    • Vars
      • S(a);OGATE,XS(J)::P(D),XS(a)
      • S(h);N_GUARD,S_CUTR(b)::QAR2(H),XP(f)
      • S(h);N_SPINP(f),SBLOCK::S(J)
      • S(h);OGATE::QAB(H),XB(k)
      • P(l);N_GUARD::R(K),XR(j)
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